/**
 * Created with IntelliJ IDEA.
 * Description:
 */

class Calculator{
    private int num1;
    private int num2;

    public int getNum1() {
        return num1;
    }

    public void setNum1(int num1) {
        this.num1 = num1;
    }

    public int getNum2() {
        return num2;
    }

    public void setNum2(int num2) {
        this.num2 = num2;
    }

    public int add(){
        return num1 + num2;
    }

    public int sub(){
        return num1 - num2;
    }

    public int mul(){
        return num1 * num2;
    }

    public double div(){
        return num1*1.0  / num2;
    }
}

public class Main {
    public static void main(String[] args) {
        Calculator calculator = new Calculator();
        calculator.setNum1(5);
        calculator.setNum2(6);
        System.out.println(calculator.add());
        System.out.println(calculator.sub());
        System.out.println(calculator.mul());
        System.out.println(calculator.div());
    }
}
